Category Archives: glaciers

Tamino is writing about this subject, too. That entirely makes complete sense as it is the biggest geophysical and environmental story out there right now. I’ve included an update at this post’s end discussing the possible economic impacts. It’s been … Continue reading →

(Amendments on 25the April 2016.) Sorry, folks, it’s It’s not just El Niño. El Niño’s have gotten bigger over the years. (Click on image for a larger picture. Use your browser Back Button to return to blog.) (Click on image … Continue reading →

Dr Ricky Rood is a professor at the University of Michigan, both a meteorologist and climate scientist, and a regular contributor to the climate and weather blogs at Weather Underground. In a post from April 6th (titled “No Way to … Continue reading →

Lonnie Thompson, PhD,Byrd Polar Center, Ohio State University: “When I first started working on this and seeing the system change, I think it was 1992 when I first testified at U.S. Senate on climate change. Back then I talked about … Continue reading →

Kalman filtering and smoothing; dynamic linear models

I have used dlm almost exclusively, except when extreme efficiency was required. Since Jouni Helske's KFAS was rewritten, though, I'm increasingly drawn to it, because the noise sources it supports are more diverse than dlm's. KFAS uses the notation and approaches of Durbin, Koopman, and Harvey.

``The real problem is that programmers have spent far too much time worrying about efficiency in the wrong places and at the wrong times; premature optimization is the root of all evil (or at least most of it) in programming.''Professor Donald Knuth, 1974